| NJ2 | |
| Powertype: | Diesel-electric |
| Builder: | GE Transportation Systems |
| Buildmodel: | C38AChe |
| Builddate: | 2006–2007 |
| Totalproduction: | 78 |
| Uicclass: | Co′Co′ |
| Length: | 20853mm |
| Width: | 3119mm |
| Height: | 4765mm |
| Fueltype: | Diesel |
| Fuelcap: | 9000L |
| Watercap: | 925L |
| Axleload: | 23t |
| Locoweight: | 138t |
| Maxspeed: | 120km/h |
| Poweroutput: | 3800kW |
| Transmission: | Electric（AC—DC—AC） |
| Fleetnumbers: | NJ20001-NJ20078 |
| Operator: | China Railway |
| Locale: | China |
The NJ2 is a diesel-electric locomotive used by China Railway in the People's Republic of China. Built in Erie, Pennsylvania, it is based on a standard GE Transportation Systems GE Dash 9-44CW and marketed as GE C38AChe.
It was specially customised for high altitude operation on the Qinghai-Tibet Railway route. It is used on the Qingzang Railway that connects Xining, Qinghai Province, to Lhasa, Tibet Autonomous Region, in the People's Republic of China.